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With the Wolfdale core Intel pours more power into a Core 2 Duo package. The 45nm process allowed Intel to reduce the power needed to 65W. Lower power means lower CPU heat, which translates to lower system heat and longer system life. They also packed more features into the chip.

L2 cache has been bumped to 6MB and the Front Side Bus has been pushed to 1333MHz. You can now use both DDR2 and the hot new DDR3 memory for extreme performance. They also boosted memory access and execution speed with the Wide Dynamic Execution and Smart Memory Access. These combine to let the processor compute more instructions with more data per clock cycle. You'd better watch out; your enemies will be shooting back faster now.

The Advanced Digital Media Boost feature has been enhanced with the addition of the SSE4 instruction set and Intel HD Boost. This will give your entertainment experience a boost with better audio and video processing. It will also help with speech recognition, engineering and scientific applications. Perhaps most important of all will be the boost to security with increased encryption power and speed.

Enhanced Intel SpeedStep Technology (EIST) EIST allows the system to dynamically adjust processor voltage and core frequency to decrease average power consumption and average heat production. Combined with existing power saving features, EIST may provide an excellent balance between providing power when you need it and conserving power when you don’t.

Execute Disable Bit (EDB) Intel's Execute Disable Bit function can prevent certain classes of malicious "buffer overflow" attacks when combined with a supporting operating system. Execute Disable Bit allows the processor to classify areas in memory where application code can execute and where it cannot. When a malicious worm attempts to insert code in the buffer, the processor disables code execution, preventing damage or worm propagation.

Manufacturer Warranty

Parts

3 years limited

Labor

3 years limited

Quick Info

WarrantyBeyond any applicable Newegg return policy, this item is warranted independently by the product's Manufacturer or a Third party. Below is a summary provided for convenience only and may not be accurate or current.
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Rating: 5/5Going strong since 2008

Pros: I've overclocked it and taken it back to stock speeds so many times. This cpu is very resilient. I even broke some of the pins when I removed it from the motherboard to clean it and apply thermal paste a year ago yet the cpu is strong as ever overclocked to 3.8 with fan. could go higher but it doesn't even matter these days.

Rating: 5/5Owned this 2009 - Still Great

Other Thoughts: I have had this processor in gaming rig for over 6 years. I have not needed to upgrade my gaming computer in so long because this CPU is still going strong. Hope I have this much luck in my future purchases :)

Rating: 5/5Still strong in 2014

Pros: Very reliable CPU. Bought this CPU in May 2008. This is still running strong in Nov 2014. It has survived a motherboard, and a video card, and refuses to be fail. I can still run modern games with this computer. I am proud to have bought this CPU.

If you are looking to obtain a cheap, reliable processor that can run many modern games, consider this one.

Rating: 5/5Still Going...

Pros: - Works as intended with no surprises- Overclockable (though, you need a good motherboard, P45 is a good Intel chipset for this CPU)- Durable (Still using it and went from main --> backup --> home server from January 2009 to present)

Ran @ stock speeds for a long time (January 2009 to summer 2011) and then overclocked it after getting a better cooler (Zalman CNPS9900ALED) for a good deal around summer 2011. It has stayed overclocked to 3.6 GHz (20% OC) with 400 FSB x 9 multiplier. The Kingston HyperX 4x2GB = 8GB had to be adjusted to 2.66 x 400 = 1064 @ 7-7-7-20 @ 2.0V afterwards from the original 3.2 x 333 = 1065.6 @ 7-7-7-20 @ 2.0V.

Did a lot of work with this in my main system for the first couple years before I phased it out to home server/networking duties. It has survived through my college years.

This Core 2 Duo E8400 CPU is just a great product of engineering. I expect this to be one of the proud artifacts humans dig up hundreds to thousands of years from now, assuming humans are still around.

Cons: - Will be fine with stock Intel cooler for normal spec'd operation but will definitely need a good Intel P-series chipset motherboard (I recommend P45) and a good cooler if you plan to overclock it.

Other Thoughts: You can get these CPUs still on other online auction or retail sites for $5 to $20, a good P45 DDR2/DDR3 motherboard for $50, 4GB of DDR2 for $10 to $20 (or 4GB of DDR3 for dirt cheap), and the other stuff (cooler, tower, GPU, hdd/ssd) for $80 to $150, and you got yourself a very capable PC for $145 to $240.

Rating: 5/5Best CPU of all time?

Pros: Built my first ever PC six years ago and put this beast in it. It's still running strong. I was on a very limited budget at the time but read every review I could to justify the high cost... Worth every penny.

Cons: I could not for the life of me get it to OC. It might have been user error, but I tried EVERYTHING. Not that I needed it, but still would have been nice.

Other Thoughts: Paired it with an Arctic Cooling Freezer Pro 7 and it was cold as ice. I'm getting nostalgic just thinking of this. One of the best purchases I've ever made.

Rating: 5/5Upgrade

Other Thoughts: Got my old Shuttle XPC box back (originally with a E5200) and replaced it with this for an old skool "GOG Box." Got it used from secondary markets and it's working perfectly. The later LGA 775 processors are real workhorses - I still have my Q9550 in another machine that's chugging away as well. Running WinXP on this and will setup a seperate LAN for my older computers with X-Forwarding capabilities to connect to the Linux server so they can do web browsing and other stuff safely. Sweet!

Rating: 5/5

Pros: When I purchased this cpu, I was building my first real proper computer, I knew nothing. And upon installing it, I didn't latch the heat sink all the way down. My computer kept crashing and I couldn't figure out why, for a few hours after turning it on for the first time, it kept rebooting. I was murdering this processor. I did eventually figure it out that same day, fix the heat sink, and it ran perfectly at 3.0ghz for 4 straight years, and I'm still using it today. Rock solid cpu, worth every penny, and after reading these other reviews I feel like I own piece of history.

Cons: None.

Other Thoughts: I never could over clock it, no matter what board I put it in, what settings I use, it just boot loops. But I can't blame it, I did fry the thing. I regret that greatly :/

Rating: 5/5NEVER DIES

Pros: I have had this processor for over 5 years since it came out. Well I am typing this with it still screaming. It is faster than most current I3's and some I'5s. It never dies and I have never had a problem with it. I have had it overclocked at 3.6 ghtz since 2008.

Cons: DISCONTINUED

Other Thoughts: If you can find one....get it. It will outlast any other processor on the market.

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